Chemistry of Paints
WITH PRACTICAL OBSERVATIONS
ON THE USE OF PAINT AND
THE SELECTION OF COLORS.
DESIGNED AND MADE BY
HARRISON BROTHERS & CO.
FOUNDER OF THE HOUSE OF
HARRISON BROS. & CO.
THIi Cl IlCMI^l K\-
1 '.MX 1
N I'chruary ISS6, a coniinittcc of the Master Painters of Phila-
ddplua called upon Harrison Uvos. & Co. to request aid in
. ntertain.n;; the Master Painters' Association of the United States
am LaiKub. vvl hold its reRular annual meeting' in
h ladelphia m the follownig July. The firm promptly suhscril)ed
to the ^^eneral entertannnent fund, and favorably considered the
suj^-e.tion of the connnittee to open their works to the inspection
ot the inemhersof the Association, so that they miRht vievy the opera-
tions of panit-makinK throu-h all the various processes, heKinninir
at the crude material and endin- with the hi-hlv-finished pigments
in condition to meet the varied recpiirenients of the trade. This
was an especial consideration on the part of this firm, as their
works are usuall\' closed to visitors because of the employment of
niuch special machinery and processes not elsewhere in use. Never-
theless, as these factories are the only plant in which the manufacture
ot acids and chenncals is conducted in conjunction with the manu-
tacture of paints, and as the association mi^-ht not have a similar
opportunity ofTerin<r such interest and instruction, the firm waived
all rules and precedent so that the local committee might be in posi-
tion to entertain their guests in an unusual manner.
^ The inspection of large works (especially such as those at
(xrays Ferry, which include thirty-five different buildings and
departments) at any time is more or less fatiguing, but in the
middle of summer it may he particularly so. owing to the heat ; it
was, therefore, thought desirable to make special provision for the
comtort, as well as for the instruction, of the visitors The entire
matter was given in charge of one of the firm's business managers,
who was enjoined to spare no expense in making complete in every
respect the arrangements for a satisfactor\' and pleasant visit.
THE CHEMISTRY OF PAINTS.
Committees from the clerks and salesmen were appointed to take
charge of the various details. After careful planning, a route was
laid throughout the entire works, so that all might be seen without
retracing an}' steps, and, where necessar\% special passage-ways
were constructed to accomplish this end. A guide-book was care-
full}^ prepared, and all the prominent points were numbered in
large figvues, with corresponding numbers in the guide-book for
reference, so that, b}^ the aid of the book, any one could readily
understand the connection of the different factories and the
A special train of seven passenger coaches was pro^'ided to
carr}' the members of the Association from the Broad Street Sta-
tion (which was near their general meeting hall) directl>' into the
works. Ijpon leaving the train, preliminary light refreshments
were provided, so that prior to starting on the tour all might
be in good trim. Although the progress through the works
was rapid, several hours were occupied in making the inspection,
and it was nearly dark when finished.
The visitors were then conducted into a large tent erected for
the purpose, where tables had been set and covers laid for over
four hundred guests ; brilliantly lighted with electric and Siemens
lamps and elaborately decorated with natural plants and draperies,
the scene impressed ever>' one with its richness and its beaut}'. A
banquet, ser\'ed by one of Philadelphia's famous caterers and
enlivened by the music of a militar}' band, was thoroughly
enjoyed. The usual speeches concluded the affair, and the
special train landed the beaming and rotund painters safely at the
Broad Street Station before midnight.
The arrangements for the exhibition of the works and foi
the entertainment of the guests of the firm were unanimousl>
declared fitting and complete.
The following description of the processes of paint making
is largely taken from the guide-book prepared for the above-
mentioned occasion, and it is hoped that it will interest and
instrucl: all who may have anything to do with j^aints.
Pigments and material used in the manufacture of paints
are so essentially chemical products that their consideration is
involved in that of manufacturing chemistr}-; and, as manu-
facfluring chemistr}' so largely depends on sulphuric acid, it is
well to hav^ some information as to the manufacflure of this
article and its relation, through the many intermediate processe*i.
to the manufacture of paints.
THE CHE.tr/S7Jiy OF PAI.XTS.
W nil that thought we start our guests at the beo-in-
nuigot chemical proces.ses, showin| the pile of brim-
stoue, which ,s the article as recdved from sSly
siuelted there in a primitive way from the brimstone bearin<. rock
This is cnide bnmstone, and it is procured by a crude proems ■
but by selection a wonderfully pure article can be had ^ '
it- }^^ k'^T^ '^'', '* ^""'^ '" t^^ furnaces arranged for
m this ^^^^- the fumes are similar to those o-fven
from a sulphur match, and are sulphurous-acid "-as
by coming m contact with oxidizing material^crenerallv ^m
viced m the form of nitrate of soda-fs converted into the hi<?er
n^f 1 % '"^P,^^""'^ ^<^id. The hot gases from the buyers are
parsed through a tower called a "Glover" tower whicHroJides
oxidizing material b^- means of a cascade of mixed sulphuric add
Sln'cLmblr^^ "'''"^'' ''''' ^'"^^^ '^^^-^ -^° ^^^ 4e
We now reach the chamber floor and have a
view between two of the leaden chambers, which l««<^^"
^^?, ^M°'^'" ^" ^^^ factory- as " Chambers 3 and ^^''^'^i'^"-
them t^ T^ °^ ^^"^^ ^"^ ^^^^^ '^ ^^5 feet. We walk between
XlZ}^ continue our iin-estigation of the process. In these
chambers there is a continual commingling of the sulphurous
fumes, the nitrous gases and steam: also more or lels S? wS
flows ,11 through the sulphur burners during the combust on of
the bnmstone. We can hardly say "air," because it is largely
nitrogen, or devitalized air-that is, air with itsoxvgen extracted
bustroy^^^^^i?^ ^°i!'^ ^Z ^h^, sulphur in the process of com:
bustion^ The draught through the chambers carries these
mingled gases along, depo.siting on the wav, bv a continual
aroppmg, the sulphuric add, which collects at the bottom The
acid thus collected is known as "chamber" acid.
\Ve now reach the end of the chambers and
make our exit from the building opposite a tower
Ihis IS known as a " Gav-Lussac " tower, from the
name of its famous inventor, and is intended to remove any
valuable constituents remaining in the gases which have passed
through the chambers, and which were not deposited m
tne iKjuicl acid. In the process of removal a cascade of acid
IS emplo>-ed, as in the Glo\-er tower, the object, however beine
-o take from, instead of to give to, the gases. The acid, flowing
THE CHEMISTRY OF FAIXTS.
CDiitiiiually over proper niaterial, presents a large surface to the
ascending gases and dissolves out the valuable portions. Finally,
the exit is through the high pipe; and when the chambers are
working well, the escaping gases are mainly made up of steam
We now reach the concentrating apparatus.
The acid from the chambers is first passed into leaden
t^-at^ng P^^^^ supported on iron framework enclosed in brick, in
Apparatus, which the first concentration is made. From these it
passes into the platinum stills, of which there are two
sets constantly at w^ork. These stills are ver}- costly appa-
ratus, although externally they do not impress one as beino
very valuable. They consist of a number of platiimm dishes
enclosed in lead; each dish has an adual mone\'-\'alue of
The Theo • ^^^P^^^^^ ^^^^ '^^ ^'^^V^ eager for water — so eager that
of concen^ ^^ ^ saucerful of oil of vitriol be exposed it will draw
tration. the atuiospheric moisture to it and soon run over the
sides of the dish, increasing its bulk, and weakening
itself accordingly. Concentration simply consists of depriving
the acid of its water by means of heat. Immense quantities
of water are necessar}- to surround the apparatus to cool the acid
after concentration, its temperature being from 600 to 700 degrees
Fahrenheit when it leaves the platinum apparatus.
Next we see the apparatus for moving oil of vitriol. It consists
ot large receivers made of iron lined with lead, into which the
acid flows; when filled, the supply is cut off, and air, under heavy
pressure, is forced on top, driving the acid out from the bottom
by a suitable outlet. As acid is almost twice as heavv as water,
it will take about twice the pressure to lift it to any height; con-
sequently, the air-pressure required is sometimes ver\' great, the
acid frequently being lifted to a height of sixty feet, 'it is forced
by this system to the different portions of the works. Its uses in
tlie paint department are numerous.
r..^^}^Y^i^ ^^'"^t ^^^ ^^''^^^>' ^^^" referred to as a sort of i.rime
comL-2u^^^^^ manufacturing processes; it might almcist be
tHS K ^ J^ "-^^^^ "^^^'^^ t^^^ machinerv of a facton .
neZl Ivi?!^ t^^f^ '^ ""Tl ^ paint-or, in fact, anvtliing con-
Lnd. IV''V'1^'~'"'''H^^^^ ^^^'"^ important material cannot be
iHrep^ration^^^ or <iirectly entering into, or connected with.
hJh^^^^ 'l^ ^^/-^ ingredient, naturallv. of that great
bugbear of the painting fraternity, "barvtes," which is a con;
THE CHEMISTRY OE PAIXTS.
pound of banum and sulphuric acid. It will be found in all
chrome yellows which are paler than a neutral medium, and even
in this It IS a constituent of some of the salts employed in its
manutacture. It will be found in some fonn in the majority of the
earth paints. It is employed in the refining and bleaching of oil
In tnese works there are four sets of sulphur burners such as
described, each burning daily 6000 pounds of the brimstone or a
total of 24,000 pounds. The furnaces work continuously' day
and niglit, weekdays and Sundays, stopping only when necessary
to repair the chambers. The daily product is about i is 000
pounds of chamber acid, equal to nearly 75,000 pounds of con-
centrated sulphuric acid or oil of vitriol.
As sulphuric acid enters largely into the composition of alum,
the manufacture of this will now be described.
We enter the claA-grinding room. This clay is
knov;n as bauxite, and the best deposits are found in ^^""^ ^^^^
the South of France. It is ver>' rich in the ma- ^^"^'"g^-
tenal known as alumina. The clay, after having been thoroughly
calcined, is ground very finely in the mills seen, which are kept
continually running to grind the large quantity daily used. When
this clay is mixed with sulphuric acid, the alumina is extracted
and is finally utilized as alum.
Next we enter what is known as an "attacking"
department. You will here see the large vats for the
treatment of the alum clay with sulphuric acid, which
extracts the valuable constituent, leaving behind all
the insoluble and useless material.
Now we enter another building, used for the separation of the
extraneous material from the alumina solution, also for the
partial purification of the same. In the cellar of this building we
notice engines and mills for the grinding of some of the material
used in the purification processes ; and on the second floor we
find a number of filters, which are used for taking out the
remaining light insoluble matter which will not readily settle.
We pass more filters and settling boxes, and see the alum
boiled do\vn to a thick mass which is fluid when hot, but which be-
coines solid when cold, somewhat resembling clear sugar-candy.
This is perfectly pure sulphate of alumina, or concentrated alum.
We continue through this building, passing stacks
of alum ready for shipment. Alum bears a highly ^"""^^^
important part in the manufacture of colors, and it *'^^"'°'
is very necessar\' that it be pure. The purest made is that known
THE CHEMISTRY OF PAINTS.
as "Turkey-Red" alum and is intended for turke3^-red dyers; it
must be so pure or free from other substances that one pound of dele-
terious matter should not be found in 100,000 pounds of the alum.
Alum is interesting to the paint man as gi\'ing
•^^"c^i^rr^ the basis for carmine and nearly all lake colors, and
is used also in greens, yellows, Prussian blues, and
other paints. The producl: of these works is about 300 barrels
daily. The alum used in the color-making department is the
We pass out of this building, cross one of the rail-
Labo- ^Q^^ sidings, and go up stairs into the laboratorv^
ra ones. building, whcre, in one of the best-appointed and
largest laboratories connected with any establishment, some half
dozen chemists are continually at work examining the crude
material that comes into the factory- and testing the finislied
products. Besides the chemists employed in the laboratorv', each
department is super\'ised by a chemist who has his own minor
laborator}' or testing room. In all the processes of this establish-
ment tests must continuall}^ be made to determine that the
processes are being properly conducted. The "secrets" of the
business of this firm are the employment of able talent and a
close attention to chemical principles, backed up hy a liberal
expenditure for experiment.
Directly dependent on sulphuric acid is the manufacture of
muriatic and nitric acids, which department is now visited.
Muria • '^^^ ^^^^ ^^ made by treating common salt, or any
and'xitric <^t^^^r muriate, with sulphuric acid, which takes the
Acids. place of the muriatic acid, the latter being dri\'en
oif as a gas and collected in the necessan- receivers;
and for nitric acid the same process is used, nitrate of soda or any
other nitrate being employed. Nitrate of soda, being a dangerous
substance when near burning material, is always stored in a fire-
Acetic Acetic acid is also a dependent of the suli)huric-
Acid. acid chamber, and the dejiartment for its manufac-
ture is now properlv the next one to examine. The
acetic acid employed in the arts is made primarilv bv the dr^• dis-
tillation of wood. It is a product from the' manuf^icture of
charcoal, known in its crude form as " pvrcligneous" acid; so that
it may Ije concentrated and carried from'the charcoal works, which
are principally in the woods, where timber for l)urning is abun-
dant, it is mixed with lime, and is ilun \,^u.^^^^ -.. acetate of
THE CHEMISTRY OF PAIXTS.
lime — a ven' aromatic substance in its ordinan' impure state. By
means of sulphuric and muriatic acids the acetic acid is separated
from the acetate of lime, and by distillation collected in the neces-
sarA' receivers. By undergoing various purification processes it is
sufficienth' purified from the empyreumatic matters which, be-
cause of its source of production, necessarily accompany it, to be
used, when properly diluted with water, for household purposes.
The acetic acid made in this wa}^ is preciseh' the same as that
made from alcohol in the fermentation of cider and other alcoholic
material. The quantity of acetic acid made daily in these w^orks
is 16,000 pounds, which would be equal to the acid in 450 barrels
of table vinegar. Acetic acid plays a ver>' important part in colof
making, forming, when united with litharge, acetate of lead, or the
well-known sugar of lead — probably more used in color making
than any other salt.
Aqua ammonia is a producT: of these works, but it
is used only to a verv' limited extent in paint making.
The usual process of making it is to heat sulphate
of ammonia with quicklime in a tight cylinder; the quicklime
unites with the sulphuric acid and liberates the ammonia in
gaseous form. The liberated gas is condu(5led to receivers
charged with water, in which the gas is dissolved. The liquid
ammonia, as usually sold, contains eight to ten per cent, of gas.
The strongest made contains about twenty-seven per cent. _ The
ammonia gas, by powerful pressure, may be condensed to a liquid
which can be presented only in ver>' strong iron cylinders. This
is known as anhvdrous ammonia, and because of the danger m its
use will never be' employed for popular purposes. The original
source of ammonia is principally in the manufacture of illuminat-
ing gas, there colleding in the gas liquors. The pure water of
ammonia is now obtained direcl from these liquors without first
making the sulphate. Ammonia is ver>' useful to the painter
and the householder. As a detergent it readily removes paint and
varnish. It should be in ever>' household in the land. Of course
it must be used quickly, as it evaporates rapidly and soon
dissipates its strength.
A fixed paint remover is made at these works,
known as paint resolvent. It is in paste form, and
is used by thinlv and evenly spreading it over the
paint to be removed, which it soon softens, and which ma}' be then
scraped away clean from the original surface. ^^-- --^^ ^- ^--"^^
invaluable to all painters.
This will be found
THE CHEMISTRY OF PAINTS.
White i.ead. ^^^^^^ ^^'^ ^ome to the most interesting of all articles
to those who have to do with paints— white lead.
Its manufaaure can be only briefly described. The materials used
are pig lead, acetic acid, water and tan bark. B^' a sijiecial
machine, the pig lead iscast automatically into flat round perforated
plates about Ave inches in diameter, called buckles A quantity
" BUCKLE" OF METALLIC LEAD,
of these buckles is placed in earthenware pots or jars of about one
gallon capaaty, each having two large holes in the side to permit
the hnT^^''°" °^ ^f "'■ Lugs or shoulders a few inches from
the bottom sustam the lead buckles and keen them fro
touchmg the diluted acetic acid, which is ^l po "red h
The pots are placed in layers on tan in housJs provided
for the purpose, until built up fifteen or twentv feet hi^f
or ijeds. ^ erj thmg ,s made properl>- t.ght. The tan soon heats
Principle of ^'r lerments, and generates carbonic acid- the
Corrosion. M'legar in the pots, under the influence of the 'he-it
t. . u- ^''f'P"''^t^s a"d attacks the lead, placing it im state
lafon Tn T'^ '^\'^^'^^^]i<^ -cid and moistufe now in f "e cSi
lation In from sixty to ninety days the buckles of meta lie lend
THE LllEMISTRV OF I'.MXTS.
through vats and boxes in order to permit all the coarse particles
to settle out and to wash out the reniaining vinegar uS? the
milky hquid IS conducted to the final settling vat where ft settles
tea stiff paste uliich is after^vard dried and^then gromid in oil
The pig lead by the aid of the heat and vinegar, has united\x° h
carbonic acid and water, increasing in weight nearly twentv-five
percent., and m bulk several times. ' ""'^ -^ °^^
t;^/'^ ""T P™'''' V ^''^^' ''■^''''' ^^ gaining quite a reputa- ^,,„
tionwith many discriminating painters, is made upon Process
precisely the same principles, but differenth- applied Lead.
The pig ead, instead of being cast in buckles, is reduced to a fine
powder; this powder IS moistened with the dilute acid or vinegar then
so placed that carbonic-acid gas circulates freely through it the
r^?W1 ""^■"r'"^^"''^^, f P^P^-" temperature. Sometinres this is
called quick-process lead, because it may be made in two or
^r^in Tf'^''.^^' If the difference in the weights of the minute
grain of lead powder and the cast buckle be considered, it is
relativelN- a verj- slow process— much slower than the stack process
n fur ^5 ^''^J'^'' '* '^"'^^^" ^^ the old Dutch method; and it is
wel established that the more slowly the lead is corroded, the bet-
ter the body of the white lead.
We have seen all the apparatus for making the white lead from
the pig metal to the dry white powder. Next in order, and im-
mediately adjoining the drying-houses, we enter the department
where the dr>- white lead is ground in oil, but will describe this
later on, and will now go into the oxides department
Passing a large stack of pig lead received from the
cars on the adjoining siding, we enter the furnace- °''''^* °'
room, where are found a number of retorts. The pio- ^^^^
lead IS placed in these; and when melted, the retorts tre made to
revolve, thereby constantly exposing a fresh surface of melted lead
to the atmosphere and effecting a rapid oxidation. This oxidation
IS as much a combu.stion as in the case of the brimstone. The
vital principle of the atmosphere, oxygen, combines with the lead
the first combination, or when the smallest quantity is taken'
giving litharge, or the yellow oxide, also known as massicot • a
little more gives red lead, or red oxide, also known as minium
It the lead be heated very hot. still more oxygen is taken up, and
a brown oxide of no interest to painters is formed; in faA, in the
ordinary- niaiiufacT:or>' such oxide would be called "burnt lead."
\Ve rapidly pass through this building, by the mills in
which the litharge from the retorts is ground up in water to sep-
THE CHEMISTRY OF PAINTS.
arate the unoxidized portions, precisel}' as is done
Grinding -^^ ^^ corrodiug department, previoush' described, by
r'^^f oSdes the pans on which the separated fine litharge is dried,
'°° "^ ' and by the mills in which the dry product is ground
up ready for packing.
The retort system — controlled by patents of Har-
The Retort ^^^^^ '^xos. & Co.— for making red lead and litharge,
System. ^^ showu here, gives a ven' pure product ; the lead
is entirely guarded from contact with the flame, thereby pre-
venting cinders and other dirt from the furnace becoming mixed
with it^ as in the ordinar}^ apparatus, in Avhich the flame passes
over it. A large part of the produci made here is used by flint-
glass makers, and, as they can use only the ver\' purest of material,
it follows that for all fine purposes in other lines of manufacture
where these oxides are required the produci of this depart-
ment should be used.
The next in importance to the glass makers is the
Oxides for yamish trade. The ' * Harrison' ' oxides are well known
Makers among the particular varnish manufacturers, going to
all parts of the countr\-, the Western manufacturers
especially regarding them as standard goods. The same litharge
that is used by glass makers and varnish manufacturers is
employed in this factor}^ in color making, and is delivered direct,
without any charge for packing or handling, to the color-making
department, into which we shall shortly enter.
The retorts, sixteen in all, require fift3^-five tons of lead weekly
to keep them in operation.
Next in importance to white lead is zinc white. It
is a demonstrated fact that a mixture of white lead and
zinc white makes a better paint for exterior work than
either singly. While this ma^' seem like heresy to the old-time
painter, it is accepted as a fact b}^ unbiased practical men, and by
all scientific writers on the subject of pigments and painting. It
is the judicious proportions of these two pigments, together with
their thorough combination with, and special treatment of the
oil, that has made the enviable reputation of " Town and Countr>'"
paints. We can devote a few lines only to the description of the
manufacture of zinc white. The zinc ore is ground to
Man^u^cture ^ ^"^ powdcr and mixed with finely powdered anthra-
cite coal. This mixture is burned, in specially con-
structed furnaces, on a bed of anthracite previously ignited. The
fumes arising are oxide of zinc. They are carefully conducted
THE CHEMISTRY OF PAINTS.
through proper conduits to houses filled with bags, throueh which
the draft IS forced. The gases filter through thf canvas^SepoS
ing the fine white oxide-of-zinc powder. This is the American
method, and with unimportant exceptions all made in the United
States IS by this method. The European method dififers in first
snieltmg the metallic zinc from the ore and subsequently burning it
Ihe aifferent grades of zinc white are established
simply by the proximity of the product to the furnace different
The bags nearer the furnace will contain the oxide of ^''^'^^^•
poorest color and mixed with a minute quantity of ash The
more distant bags will have the whitest and purest oxide.
Nothing is more important to the color-maker than the
chrome salt, bichromate of potash. Chrome literally chrome
means ' ' color, ' ' and is certainly the great color producer. ^^^^
The Harrison works would not be complete without a department
for the manufacture of this valuable salt, and until the establish-
inent of this factory there was only one other in the country
that had been successfully conducted. Chrome ore a speckled
mineral, very hard and heavy, is a combination of
oxide of iron and oxide of chromium. It was mined
for a long time past in Pennsylvania and Mar>dand, and
recently in California. The supply for these works
comes principally from California and the dominions of the Sub-
lime Porte, where probably the richest ores are found. The hard
ore IS first ground to a fine powder, and until the plan
of percussion grinding was adopted it was the terror Manu^cturf
of millwrights. The powdered ore is mixed with lime
and potash (or soda, to make the soda salt) and then roasted at a
bright-red heat with free access of air. This causes the oxide of
chrornium to take up more oxygen and become chromic acid, and
to unite with the lime and potash (or soda) present. The mass when
cooled is leached, and the liquors are concentrated and treated with
sulphuric acid-~-ever present in chemical processes. This acid
takes up a portion of the potash and any lime present, leaving the
chromic acid united in double the original proportion with the re-
maining potash; hence the name ^/-chromate. This bi-chromate
liquor is then allowed to cool and crystallize in large vats or tanks,
technically known as dishes. In tlie course of ten days or two
weeks the sides and pendent rods are coated with magnificent red
crystals, which are drained, dried and packed. The product of
these works (managed under a separate organization known as
the Kalion Chemical Company) is of unexampled purity, and
tHr. i^/ir^.^U,^ iRV OF PAIi\TS.
has already received special awards at various cliemical exhi-
Having studied the manufacture of the more im-
portant chemicals required by the color-maker, we are
ready to enter the color-making department; but before
we will stop at the boiler plant, which is well
Worthy of description. Originally each department had its separ-
ate batter}^ of boilers. In several instances the allotted space had
been filled up without supplying the demand for steam. Increase
was necessar}^ and it became apparent that two batteries would be
required for one department. After much consideration, the plan
was adopted of concentrating in one building the steam
plant for the entire works. An immen.se boiler-house was
erected, the noble stack, one hundred and seventy-five feet high
seen m the view of the factories given in the fore part of this pam-
phlet, was built, and large new boilers of the most recent design
were placed in the new house. The pressure carried is one hundred
Capacity. pouuds, and the capacity is equal to over two thousand
1 , horse power. A railroad siding is laid on a trestle
along the front of the building, permitting the coal to be dumped
Kueisup. ''■^^, ^^ ^^^s directly in front of the boilers, minimiz-
My and mg the firemen's labor. Forty to sixty tons of hard coal
Consumption, are bumed daily, converting into steam from one million
to one million five hundred thousand pounds of water
The steam is supplied to the works from an immense main steam
pipe ov'er one thousand feet in length— the largest of
the kind in the country at this time. It is all wrought-
iron lap-welded pipe, made by the National Tube
,^?,^*^^- , ^^ begins with a diameter of twenty inches
Hud IS gradually reduced to fifteen inches as branches are taken
rl frZ"" ^'^r"! ^""^'^^^ ^^^'■^ '^ "^^ «"^ expansion jo t ItTs
' -^ ^^th'^^^^^^^^^ ^'"^^^ ^^™^^^ movem^ent ovei its entire
issonu^^^^^^^^ to counteract expansion and contraction.
.Ix^^^^l^^ ^'^^" '"^^'^^- ^""^ ^ ^""^^ is visible. This is
.. K-' it triumph in a construction of this kind
erSon^'^nH ^^^^J' '"^^" P^P^ ^^^"^' including ks
The vah^^^^^^^^ jacketing, was over eleven tliousand dol
thousalrdolla;^' "' ^^^^ ^"^^^ steam pi .. ; one hundred
A^oining theboner.hou.sc ,. tiu compressor room
kc^^^n !'•/.:?..'?." '^'^ ^""F -i-^^^n^Pre.ssors. whicli
TV f compressed air, at a prefr
THE CHEMISTRY OF PAINTS.
sure of seventy five pounds, for use in all the departments requir
mg It. This has already been mentioned in the description of
Uie acid works, and as we proceed we will notice the air Dines
ever}^where carr>'ing this useful force which works so silentlv'
Back of the boilers -m a large vault running the length of the
boiler-house, one hundred and fifty feet— may be seen various
pumps, storage tanks, etc., used for collecting and storing all the
condensed steam, which is pulled back to the boiler lioiwe t^
be used again in the boilers— a perfect circulation.
Near by are the powerful pumps, running night and
day to turnish the great quantities of water required. A
ten-inch main is scarcely sufficient to supply the works.
In a separate building, absohitely fireproof, is a large
fire pump, which is arranged to work automatically even when
flames so surround it as to render it unapproachable.
The steam plant is under the charge of an experi-
enced engineer. Connected with it is a large machine Machine
shop, where all repairs are made and much new work ^'''*^-
IS constructed. All the mills used in the paint department are of
special construction, and built in the machine shop. This shop is
a special feature, and its importance may be detennined from the
fact that, at times, fifty machinists and iron workers are employed.
Having examined the various departments where are manu-
factured the more important chemicals used in color-making, we
may enter the color-making department itself This
department is really a group of factories which would ^°'*""*
of themselves form an independent business, and there ^e artmJnf
are inany prominent firms and corporations whose plant ^^^^ '"^"''
consists only of wlmt in the Harrison works is a single depart-
The first minor department we enter is for the manufacfture of
American vermilion; this article is a combination of chromic acid
and oxide of lead, the latter existing in large propor-
tions. It is made by boiling together white lead and
bichromate of potash, and subsequently treating the
produci with sulphuric acid; the result is a cr>'stalline orange
chromate of lead. The Harrison brand is known as " Chinese
Imperial Scarlet." Its use was at one time almost universal inagri-
cultural-implement nnd wagon fa(51ories, but recentlv the imitation
of Knglish vermilion has greatly surpassed it. Considering its
cost and durability of color, it is, after all, a ver\' useful pigment,
and is yet tlie standard color of many such establishments. '^If the
THE CHEMISTRY OF PAINTS.
crystals be crushed, the color thereby becomes much lighter, or the
same as the uncrj^stallized orange chrome. Americau vermilion
is very frequently adulterated with red lead and barytes.
Next to this, in a separate building, are the cylinders for mak-
ing English or mercurial (quicksilver; vermilion. This is a com-
bination of sulphur and mercur}-. Mercury or quick-
silver, sulphur and a solution of soda are placecl in a
heavy iron cylinder so construdled that when it is
rapidly revolved a violent agitation of the contents results; great
heat is generated, and the sulphur and the mercury unite. Great care
is necessary to secure a good color. A natural color of the com-
bination of sulphur and mercury is black, and the red color is
largely due to friction. The chemical composition of both the
black and the red sulphide is precisely the same; the difference is
due to a difference in the arrangement of the particles, or what
the chemists call the molecules: a chemist would say it is a dif>
ference in molecular structure. This fact accounts for the tend-
ency of quicksilver vermilion to blacken: it is the tendency of the
compound to return to its more 7iatural black state. As there is
ahvays an escape of sulphuretted gases in the manufadlure of this
article, it is necessary to condu(5l it in an isolated building freely
ventilated; othenvise, all the lead colors— such as }'ellow chrome,
green, etc.— would be seriously damaged bv the formation of the
black sulphide of lead.
We all know that one of the most wonderful exploits of
chemistry was the discover}^ in nasty coal tar of the most bril-
liant dyes. One of these dyes is called eosine. Bv itself it is a
most lovely rose color; when the red oxide of lead 'is dved with
it. a magnificent vermilion is obtained, as much brighter than
the quicksilver vermilion as the latter is brighter than the lead
vermilion. This brilliant pigment is known as imitation ver-
milion, and is sold under various fanc3'-names, many of the
manufacturers adopting the names of the celebrated mines of
quicksilver. One of the most famous mines is that of Idria. in
Austria; the imitation vennilion made at this factorv is named
alter that mine, prefixing the word " New." ' New Idria
vermilion is well known to all consumers of vennilion
as one of the best of the class. New Idria vermilion
^trnncr^^f ^"^ made from the finest orange mineral dved with the
tll^T\^?x:''^\ /^' T ^^^ ^'^^^^^ ^^1^^^' imitation vermilion is
^nS^^^ ^' ^'^^^' ^^^ chief adulterant is barytes:
some specimens contain as much as ei^hlv-five per cent. Other
THE CHEMISTRY OF PAEXTS.
adulterants are whiting and terra alba. Some are made with the
addition of white lead; this requires more eosin, and a beautiful
crimson shade is produced. This, however, rapidly fades on ex-
posure, and the best and most permanent is that made with
orange mineral and eosin only, which give the rich scarlet shade.
The operations of making the American and imita-
tion vermilions are conducted in large vats or tubs. drying
The finished color is then freed of its water as much ^™^'
as possible by filtering and pressing, and the moist mass
is afterward removed to the drying rooms, where the re-
maining moisture is dried out. In the past the final drying
required weeks; now days are sufficient. The unscientifically
constructed drying closets are replaced by rooms built entirely of
brick and iron. Each room is provided w^ith a fan, which forces
throughout the entire space a continuous current of warm dr^- air
in a complete circulation. The color, in cakes, is placed on trays,
which are laid on racks. Each color has its own room. The fans
are run by small engines, which operate day and night until the
cakes of color are bone dr}-. The room is emptied and filled
again, closed up, and the operation continues without the least
possible loss of time. Each sub-department of the general depart-
ment of color-making has its own drying rooms. From the dry-
ing rooms the vermilions are taken to the grinding and sifting
apparatus and reduced to the fine state in which they are found
in the dealers' hands.
The ne.Kt department we visit is that for making yellow and
orange chrome. These also are combinations of
chromic acid and oxide of lead; but for these, lead salts —
the nitrate and acetate of lead — are used. A nitrate of
lead will give a yellow with physical properties different from one
made of acetate, though both have precisely the same chemical
composition. This is again due to the different arrangement of
those imaginary atoms called by the chemist molecules. We see
large vats in which the various salts are dissolved; when of the
right temperature and density, these solutions are run together in
large vats, and the color is seen to fall out. This is called * ' strik-
ing" the color, and the operation is one of great delicacy. The
chemical change is easily understood. Acetic acid and oxide of
lead are combined as sugar of lead; this is soluble in water.
Chromic acid and potash are combined as bichromate of potash —
a salt also soluble in water. When the two solutions come
together, the chromic acid goes to the lead, making
THE CHEMISTRy OF FAINTS.
Theory of chromatc of lead, and the acetic acid goes to the
urn Potasli, making acetate of potash. The chromate of
• lead IS the insoluble chrome yellow, and falls out of
the solution. The acetate of potash is soluble, remains in the
hquid with the color, and is finally washed out with pure water
This operation is one of precipitation. The reaction is called
double decomposition, and the foregoing explanation answers for
all colors made by precipitation.
This leads us to consider color-making in a more general way
We are now in the chief color-maker's office, and find it quite
color- ^"°'^^<f ^° appearance to the laboratories referred to on
Making a P^p ^- ^^ IS a laboratory as well as an office. The chief
Science. color-maker is a chemist who received most of his train-
ing in the general laboratories of the works; his assistants
are required to be able to make chemical tests, and are expected
to familiarize themselves with the chemical knowledge bLnim
directly on their work. While color-making involves Aat m.glu
be called many 'rule-of-thumb" operations, yet ever>' one
t^^fl so-called "rule-of-thumb" practices, when viewedlom a
scentific standpoint, is capable of being resolved and amplified
into snenUfic practice. Much mysterj- is thrown around this
bvT/.r^f^^'''-^"- '"'^'^"^^ '^^P^"^^ "P°n education guided
by practical experience. Many of the most valuable chen^^
knlvn^fof ^^%b'^-\evolved from facts or results noticed a" "d
known for a long time by workmen, and it is only when some one
or the?rv"?T"i;"'r '^' ""^T ""'. ^^^^'^ ^^^^^' ^'"^ ^^^ "-""
IL ;.-?^.,ru ^"^' f'^«^0"^-e<-ed and more fulh- and scientificalh-
applied. When, in the color-making department, it is ascertained
that brown sugar of lead-an impure salt as compared with the
beautiful white crj-stallized sugar of lead-will niake certain
colors which the white will not>roduce, we .soon learn that the
very impurities, which consist of%yroligneous naUe a ve a
SS sTts'on'tf '''^'''\ T^i'^'^P^-^t^ ^J- reactSn c'th^
take Place ?f abs^bft f «'l>'-fo™^ed color-a reaction that would
lake piice it absolutely pure chemicals were used without the
pyrohgneous mordant or its equivalent.
Adulteration • ^^rytes is the Common adulterant of all paints and
«rcoior. 's u'.ed immediately Ix^fore or after • • striking' ' t lie cX
ra uses increased doses of bar>tes as comiH.-titi<,n
THE CHEMISTRY OF PAINTS.
lowers his pnces. The dishonest painter makes two coats of paint
till his contract for three; he buys adulterated oils, or wilfully
adulterates them; he will take a strong-bodied and oriRinallv
reliable paint, and by reducing it with all the cheap and vile
material it will bear will make a profit out of a contract taken at a
rate that would net only a loss to the honest man.
Fortunately, the great majority of painters are honest; and the
crusade against low-grade paints started by the proprietors of the
works we are now describing is forcing unscrupulous paint makers
to adopt higher standards. While bar>'tes is used almost invari-
ably as a mere adulterant, it occasionally serves the purpose of
diluting a color, or, more properly speaking, of separating its parti-
cles and delaying— or preventing, possibly— chemical reactions
which speedily might occur were the color perfedly pure. In its
precipitated form, or as blanc fixe, it is an invaluable material
when used as a base for certain light lake colors which could
hardly be coUecfled but for such a base; so, when the analysis of a
color shows the presence of barytes, it is necessary to go farther —
and the intelligent analyst knows how to go farther— to discover
whether this sulphate of baryta which he finds is the crude
native mineral simply ground to a fine powder, or that precipi-
tated to impalpable fineness from solutions— the blanc fixe. The
proprietors of these works stand alone in having for a long
time past steadily and persistently exposed to painters the frauds
pracflised upon them; yet they know that sulphate of bar>'ta is like
a great many other things in constant use: it may be used prop-
erly or it may be abused. On general principles, however, it is
safe to turn resolutely from any color which consists largely of
barytes. Some colors are wonderfully strong, and may apparnii-
ly still be good colors, when there is no standard near for com>
parison, and yet may contain ninety-five per cent, or more of this
To insure success in these days of intense com-
petition, not only must the scientific features of color- ch^nTcs^Si
making be well understood, but all the mechanics of m k^'^*^'
the business must be thoroughly studied. In these ^ ^°^*
works every known appliance is used; the agency of compressed
air is brought into play wherever possible; the old-style slow-
working filter and the hand press are replaced by the filter press,
in which machine are combined the two operations of
filtering and pressing. Some colors, such as ver-
milion, will not readily permit the employment of the
THE CHEMISTRY OF J'AIAJ^.
filter press, and for such colors very few modifications of the old
processes are practicable. Colors such as chrome yellows, chrome
greens, Prussian blues, Tuscan red and the lakes make a thin fluid
pulp which may be forced into the filter press through pipes.
The thin color is run from the striking tub, after it has been
washed, into a vat of sufficient size to hold several batches; in
this they are intimately blended, to insure uniformity of shade.
Next they are run into a cylindrical vessel made of ver>' heavy
sheet copper: this is called vwntjus (meaning to raise liquid);
and when filled, the inlet is closed. A pressure of fifty to eighty
pounds to the square inch is applied to the surface of the pulp,
which forces it from the exit tube opening at the bottom of the
vessel and connecting with the press; the press is rapidly filled
up, and the cakes of color become very dense, the water being
squeezed out by the powerful pressure.
The air pressure is used in the color-making depart-
^re^ °d^AiT ^^^^ ^^ move acids and chemical solutions which
presse ir. ^^,^^^^^ corrode pumpiug machinery'; the operation is
swift, noiseless and certain. The compressed air is also made to
do certain other work that formerly was done by the hand of the
The description of the manufacture of chrome yel-
Seenl^ low applies also to that of chrome green. This is really a
mixture of yellow and blue, and the two colors are
thrown down together, which gives a brightness and a per-
manency not obtained by simple mixture. When the jellow is
taken from the drying-room, it is ready for sale as dry 3'ellow, or
for deliver>' to the grinding department to be converted into oil
color. Chrome green, before it is packed for sale dry or before it
is transferred to the color grinders, is first reduced in dr>' color
mills to a fine powder. Sylvan gr^en, so well known
Grl^u ^^ ^^^^ trade in general, is made here. This is a ver>'
permanent and brilliant green, and it is made in six
shades — from ver>' pale to very deep.
Chinese Blue Chinese and Prussian blues are ])roduced from pnis-
anrp^ssila ^^^^^ ^^ potash and an iron salt — usually copperas. If
Blue. ^^e yellow prussiate of potash and copperas be used,
the color, when first struck, is ivhite: this by oxidation
turns blue, and the oxygen of the atmosphere will effect thischange
if sufficient time be given. To obtain quickly the rich deep blues
with a lustre of bronze, there must be recourse to powerful oxidizing
agents, aided by heat. Strong nitric acid is used for some blues,
THE CHEMISTRY OF PAINTS.
chlorate of potash for others; and various other agents are em-
ployed. Soluble Chinese blue for the laundry is an important
feature of the blue department. There is but ver>^ little chemical
difference between the ordinary Chinese blue (which is insoluble
in water) and that which is soluble; this quality of solubility is
obtained chiefly by special manipulation. Blue is very light, and
it fonns a very bulky paste; hence for the same product more
presses are required in this department than in any other, except-
ing in that for the lakes. The advantage of the application of me-
chanical principles in increasing the output is not so well shown
anywhere else as in this department. Were the old methods of
filtering, pressing and drying now in use, at least five times the
floor area would be required for the present output.
Leaving the sub- department for blues, we enter the factory for
the manufacture of Tuscan red and of lake colors. The apparatus
in this department is quite similar to that we have seen in the
others— the striking tubs, though somewhat different in shape,
the filter presses, with the addition of peculiarly-shaped copper
vessels, resembling a ball drawn out; these are suspended^ in iron
frames which pemiit them to be turned over in order to discharge
their contents. These are known as autoclaves or digesters, and
their purpose is to extract the coloring matter from dyewoods;
the extracted coloring matter, in hquid state, is stored
.* ^ 1/- 1 ' A^ * ' • Colors froni
away m vats until wanted for use, when it is precipi- Dyewoods.
tated, by means of alum, tin salts, barium salts, etc.,
according to the nature of the lake and the color or shade desired.
The texture of some of the very fine colors made in this depart-
ment would be injured by the severe pressure of the filter press,
and for these, vacuum filters are employed, using an opposite prin-
ciple, apparently, but really the same; for by means of a partial
vacuum the natural pressure of the atmosphere is in part realized.
The principal dyewood used is Brazil-wood, from which is pro-
duced the lake most largely used in paint-making, chatemuc.
This w^ood also gives us rose pink, which is simply a lake precipi-
tated on Paris w^hite. Carmine and its lakes are obtained from
cochineal. The carmine apparatus is entirely distinct, and is
separated from all the others. The majority of the lake colors are
comparatively fugitive: therefore it is desirable to select such
material as will give the more permanent colors.
Tuscan red is made in this department; generally it ^^^^^^
is simply a mixture of Indian red and rose pink. Har- ^^
risons' new Tuscan red is made upon scientific principles
THE CHEMISTRY OF PAINTS.
and is the most brilliant and the most durable color of the kind that
is known. The enriching lake is almost imperishable, and will bear
a temperature of 400° F. without being sensibly affecfted. Tuscan
red is a sort of connecting-link between the 'lake colors and the
mineral colors. The* 'Town and Countr>^" Ready-Mixed Paint
No. 618, which is such a great favorite, is made from this new
Many of the recently-produced coal-tar dyes have much greater
Coal Tar pemianency than thosc first made. This enables the
p°^enu. paint-maker to give to his trade brilliant pigments that
theretofore were unknown. One produced here is the
now celebrated Ottoman red — a color much less costlv and of
more body than carmine, but equal to it in brillianc}- and per-
The machinery' for powdering dr}^ colors is a very iniport-
rowderinff ^"^ feature of this large color-making establishment,
Machinery. ^^^ ^^ quitc distiudly Separated from the apparatus
employed ni the other processes. Mills are the same
m principle, as a rule, no matter what their special use, and the
description of one answers for all; special mention of them will
be made farther on. It will be noticed that great care is taken to
isolate each color completely. In one room, in which evervthing
IS green, there are several mills, and breakers and great pi'les of
green on the floor. To keep the shades of standard goods striclly
uniform, 25,000 to 35,000 pounds of the dried color are manipu-
lated at one time. The dried color is brought frora the dr}ang-
rooms direolly here; it is immediately passed through the
breakers and then piled in heaps and mixed thoroughly^ after-
ward It is fed to the mills, ground to the required degree of fine-
ness, and discharged through spouts into the storai,-e bins on a
In the blue-grinding department are two divisions; one is
lor soluble or laundr>' blue only, and the other for Chinese and
other blues intended stridly for pigment use. In one room the
prevailing color is maroon, and here Harrisons' new Tuscan red is
ground to an impalpable powder. In the red-millin- department
there are three divisions— one for quicksilver vennilion, one for
American vermilion and the other for New Idria vermilion As
the vennilions are more deleterious to heaUh than other colors
precaution is taken to keep the air clear of dust. Over the
hoppers of the mills, and over all points where dust mav escape
mverted funnels connected with large galvanized iron pipes may
TUh: CHEMFSTRV OF PAINTS.
Health of the
be seen; these all ruu into one large pipe, in which
there is a powerful fan drawing the air through these
fu!inel-openings, and with it all the dust. This dust-
laden air is forced into a properly-construdled dust
chamber, where the greater part of the floating color is deposited;
that which is not caught in the chamber is colledled by means
of a spray of water. Similar appliances were seen in the oxide
and white-lead departments, and are in use where all dangerous
dusts arise. Workmen in these departments are required to
change their clothing in a special room entirely apart from the
work places; aside of this dressing room are large bath and
wash rooms, where ever>' facility is afforded for a thorough cleans-
ing of the body after quitting work.
Leaving the group of factories constituting the color-making
department, we pass a detached building in which are several
huge vertical iron cylinders with some peculiar attach-
ments suggesting steam-boilers. These are the water
purifiers. The water used in color-making must be very
pure — not merely clear, but free from all soluble impurities, partic-
ularly organic matter. These purifiers remove not only the visible,
but the invisible, impurities; they give purer water than canbeol>-
tained from any settling pond or crystal lake, and are of material
aid in securing the brilliancy and richness of the Harrison colors.
In the regular course of affairs the operations following the color-
making are those for grinding the colors in oil; but before entering
the oil-color mill-house we should inspe(5t the dry color-grinding
department, where all the earth colors are specially treated to
develop their best qualities. In one of the adjoining ^ ^^^^^^
storehouses may be seen great tiers of barrels, casks stor^hou^'^
and hogsheads, the contents of which are suggested
by their exterior coloring. Here is a lot of casks holding some-
thing very yellow, each package having a peculiar brand burnt
into the head; it is an invoice of the celebrated Auxerre ochre.
The marks " ss Switzerland 8-22-89" indicate that it was
received by the steamsliip Switzerland on August 22, 1889.
Adjoining is a pile of frail and awkward-looking packages which
contain ftalian siemia; the marks " bk Leandro 5-2-89" indicate
that it was received by the bark Leandro May 2, 1889. In
this manner each importation is kept distinct. There are a num-
ber of stacks of the same kind of packages, some with a reddish
look, others with a yellow or brownish stain; they all contain
siennas. Some of them are in the raw state, some of them burned.
THE CHEMISTRY OF rAIXlS.
Those ugly hogsheads, each large enough to hold a ton or more, con-
tain umber. This one storehouse is 60 x 1 50 feet, with a convenient
drive- way through it; it is filled with these foreign goods: ochres
from France; siennas from Italy; umbers from Cyprus and Italy;
browns from Germany— a big shipload in all. That immense
stock explains the enigma to those color-grinders who are puzzled
with the uniformity of the Harrison siennas, umbers, etc. These
earth pigments in the original state var}- so much that no two
invoices are alike; only by having a varied stock which may be
mixed in proper proportions can a uniform color be maintained.
In the dr\'-color grinding department the crude earth paints are
carefully picked and sorted and dried; they are then
Grinding! mixed in the proportions that w411 give the standard
Earth Painu, shadcs, and finally ground to an impalpable powder.
^^"^ Even those colors, such as ochres, metallic browns,
colcothars, etc, which by all other paint-makers are considered
sufl&ciently fine to grind in oil at once, in this establishment first
are treated in this department; none of these goods i,and only the
finest are admitted here) are fine enough.
The careful obsen-er will notice in his journey through these
great works the complete independence of one department on
another. Thus, in the dry-color grinding department is an inde-
pendent engine, enabling work to be done continually, day and
night, if the demands of the other departments, which may be
run onl}' in daytime, make this necessar\'. No color can be
properly ground unless it be bone dr}-; and for dr\'ing purposes
may be seen large steam-heated, open dr>'ing pans and steam-
jacketed revolving drums of different sizes; also apparatus which
both dries and mixes at one operation. Dr>'ing is an important
operation, for the tone of some of the colors is much impaired by
overheating. The mills are of special construclion. and are almost
noiseless in operation. Their w^ork is at variance somewhat with
those mills of which it is said,
" Though the mills of the gods grind slowlj',
Yet theygr^'ind exceeding fine,'
for these not only "grind exceeding fine." but grind ver>' quickly
and in large quantity. The impalpable color is discharged into tight
cars, which are really movable bins, all of one size, holding 500
to 1000 pounds each, according to the nature of the material.
These cars are used to store the color until it is required in the oil-
While the colors which are more directly the product of
i4i ^7 140 618 yj
[llustration of a cottage painted with Harrisons' ''Town and Country" Ready Mixed Paints.
THE CHEMISTRY OF PAINTS.
chemistry- in so large measure owe their existence to
chromium, the colors of this department — Nature's prod-
ucts, as it were— owe their being to iron almost with-
out exception. The rich brown umbers, the bright
sienr^s, the beautiful maroon in all the various shades of Indian
red, Venetian red and ochre, — all of them owe their coloring to iron
only. Vandyke brow^n owes its color principally to carbon. Ivory
black owes its color entirely to carbon.
The grinding of colors in oil naturally follows the dry grind-
ing; and we now go into a building recently ere(5led oici
especially for this purpose upon most carefully devised mui House^
plans, and provided with all the latest and best ap-
While the mechanical methods and processes now employed in
many of the important industries w^hich have risen to their present
prominence within a comparatively recent period resemble but little
the early and hand processes which they have supplanted, the
reverse of this is the case in the grinding of colors: the mills are
made much more accurately, more highly finished and of material
better adapted to the purpose than they were some years ago, but
there are no essential changes, and, after all, it is only an evolution
from the slab and muller, and no real change in process. The
mixer, however, that is now employed can hardly be connedled
with the idea of mixing dry color and oil in a keg laboriously by
hand. Even the mixer of comparatively recent produdlion, with
its one set of fixed and one set of revolving arms, cannot com-
pare with the one w^hich is here Uoed, and in w^hich,
by means of complex motion, the thorough incor-
poration of the pigment and oil is rapidly efiedled,
and with economical expenditure of powder.
In this great mill house the progress of modern
ideas is especially shown in all the arrangements where-
by the costly but needful labor and power are mini-
The exterior of the building is necessarily plain; it is so con-
strucfted as to cause the complete lighting of the interior by nu-
merous large windows, the flood of light reaching the
very centre of every floor. Due consideration is also
given to ventilation without draught, so that there is
as little dust as possible. ^ - .^ a ^
Starting at the third floor, we see here dry colors m the dust-
tight, wheeled bins which have been brought over from the dry-
THE CHEMISTRY OF PALXTS.
color grinding department. There are also such stationarj' bins
as may be necessary and convenient.
Preparing '^Jl? ^""^ material is first passed to the drj-ing
the Dry machmes, so that all absorbed moisture may be driven
Matenai out and the color property warmed for mixing. It is
Mixer. then transferred to accurate scales, carefully weighed
and quietly but quickly placed in the mixers, with the
oil or other vehicle added in carefully weighed quantities; all of
this work IS attended to by a clerk in charge.
This preparation and mixing of the colors for the mills is the
Appliances P""^!?^! Operation on this floor. Everj' appliance in
for Mining. ^°^ ^'^y of trucks, turn-tables, etc. for the rapid move-
ment of matenai may be seen; also the necessary oil
varnish and japan tanks with their gauges and scales
On the second floor we see nothing but mills— big mills and lit-
MiUs. *i^ mills, all shapes and sizes— designed especially for the
n^^ ^rir,A 7°'''^.rf^'fired of them, one pigment working better in
one kind of a mill than m another; and here let it be said that the
color is not ground once or twice or any specified number of
Fineness of \)^^'- ^^f ^""^^^ secret of the succcss of this e.stab-
crinding. "snment is, that the color must be ground until it has
,..,^K ^^^?lied the required degree of fineness, whether the
Str ^^^ '* '^ P^^^'' through the mill be one or
A feature that will impress the careful obser^•er is the entire
absence of iron mills-that is, mills with metallic grind-
ing surfaces. It was long ago decided here that these were unfit
tor gnnding colors when purity of tone was essential. In a com-
partment entirely separate may be seen the mills for grinding
coach Color. ^^^ coach colors. The fresco or distemper colors which
Fresco Color. ^^ grouud in Water, and the tube colors for artists" and
Artisu' Color, decorators' uses, also have special compartments allotted
tor their preparation.
convS t^T'""} ^^t^^l" ^i^^">' P^^^^'^ by the inspeclor. it is
comejed by elevators to the floor direAly below, eniployed for
storing and P^fl^ng. Storage and shipping. Much of the finished
Packing. paint is packed at once into cans or other packages,
carefullv nrnf^tL'^ . '^ "°* ^^^^^^ immediately is deposited in
THE CHEMISTRY OF PAINTS.
This packing floor is at such elevation as to be
level with the floors of cars or wagons; railway -tracks
pass by the two ends of the building, and all alone
one side teams may load.
Below this floor is a good high basement, in which is stored
all of the output that is packed for stock; here the pro-
duction of the winter is accumulated, ready for the de-
mands of the spring trade.
On the first floor at one time may be seen large orders in prep-
aration for the branch houses in New York, Cincinnati and Xew
Orleans; to these branch houses shipments are made in car-load
This mill house is 75 x 150 feet in area, and it is devoted solely
to the preparation of colors. The height from floor to
ceiling is quite unusual, insuring good distribution of ^^^c^P^io^
hght The construaion is on the modem slow-bum- ^mxuL..
mg plan, which also insures freedom from dust. The '^'*'''--
elevators are run at high speed, so that the movement of material
and produdt is made with quietness, accuracy and dispatch It
is noticed that there is no retrograde movement in the handling
f lb ^^^^^^^^' ^^^ ^^^^ ^^ ^ ^^^ important matter in the saving
In an annex is the powerful engine required for this
building; also the dynamo for supplying the electric
lights used after nightfall on the short winter days ^r
when the business requires the department to be run
longer than the usual ten hours.
We will now enter a much older, though equally substantial
building of the same size as the one just left; this is
used principally for the preparation of white paints. ^f \^
The white lead manufacturing departments have already ^'" ^'
been visited, and are described on pages 10 and 11.
From the dr>nng pans or kilns the finished produdt is taken
by cars over an elevated track direcflly to the third floor of the
building we are now visiting. On this floor the white lead re-
ceives a certain quantity of oil, and is chased and mulled so as to
induce the saponification that gives to white lead its superior
body; this treatment leaves it like putty. The mass is
then chuted to the mixers on the second floor, where a Treatment
further quantity of oil is incorporated and the proper Lead^*'*^
consistency for grinding obtained. The mills are on
the first floor, and are fed direcflly from the mixers; two systems
THE CHEMISTRY OF PAINTS.
of grinding are used— the new or roller mill and the old or flat
circular stone mill.
The ground lead is discharged from the mills directly upon
the rotating, hollow metal discs of cooling machines, which are
Cooling chilled by a constant flow of cold water through them;
Process. ^his cooling is essential to the good-keeping qualities
of the lead. Proper grinding of the lead continues the
chemical action between the oil and the pigment which commenced
with the first treatment; chemical action is always accompanied
Chemical ^^ ^^^^' ^^^ ^^ Continued for too long a time in the
Action. case of white lead and oil, the product is considerably
damaged; it is frequently the case that the ground lead
is discharged directly from the mills to the packages and then
lumps are liable to form or the paint turn to a bad color. All of
this is avoided here by drawing the heat oflf and thus checking
From the coolers the lead goes to storage-tubs of five to ten
tons' capacity each, in which it is allowed to season or " age."
All the white lead from this factory has a beautiful silky text-
Features ^^^> ^^^ is not excelled by any made in the qualities of
Harrison extreme whiteness, opacity, fineness and spreading
whiteijad. power; in fact, any that equals it is an accidental
rather than a regular product. More attention is here
given to supplying the particular requirements of different con-
sumers than in any other establishment; manv corroders will
gnnd their lead in but one way; the boast of this place is that
all proper requirements are provided for.
A very stiff lead, almost like cheese in consistency, is known
as "A" lead, and is especiallv acceptable to those who have been
accustomed to old English lead.
The *' I. S." is a stiff lead, softer than the "A," but particu-
larly adapted for fine inside flat work, where absolute freedom
trom gloss is a requisite.
A still thinner or oily lead, intended for general outside work
IS known as " O" lead.
1 ^.^^.^P^^i^l requirements of those manufacturers who use white
lead m large quantities have been carefully studied and provided
Lead and . ^^ addition to the grinding of pure white lead and
zincPainu. ^mc paiuts, a mixture of zinc and white lead, in-
tended for the "Town and Countr^•" paints, is pre-
pared in this building. ' ^
THE CHEMISTRY OF PAINTS.
The paint for the ready-mixed department is carried to it in
iron cars, so arranged as to discharge directly into the ready-mixed
Before entering the ready-mixed paint department, a general
inspection of the processes of receiving, storing and distributing the
oil, and a trip to the oil- treatment house, should be made. The oil is
received in barrels or tanks in car-load lots; if in bar-
rels, the entire load is run on a long skid over a trough,
bungs are drawn and the sixty barrels are drained at
one time into the trough, which, by the necessary pipes,
discharges into the receiving or storage tanks; these tanks are
made of boiler iron and placed at such points as may be conve-
nient. When the oil is delivered by car- tanks, it is discharged
directly into the receivers by gravity. The storage-tanks are all
connected with a general pipe system, by means of which, and the
aid of the ubiquitous air-pressure, the oil is distributed to any desired
point. The pipe system is extended under one of the main streets
to the oil-treatment house, situated in an isolated position beyond
the boiler-house, and nearly one thousand feet from the point
where the oil is received. The oil treating-house is necessarily of
fire- proof construction; in it all the oil used in " Town and Coun-
try" paint is clarified and made more elastic and durable by
boiling and other processes. For simply boiling the oil there are
five hooded kettles, in which 1,700 gallons may be treated at once.
The stone- dressers should not pass unnoticed. In a room by
themselves may be seen the half dozen men who are constantly at
work keeping the mill stones sharpened. The proper
operation of grinding is not dissimilar to cutting with
shears. The edges must be kept sharp, for when a mill
stone loses its ' ' dress" — that is, becomes smooth and glazed — it will
not cut the particles of material into smaller particles; it may mull
or crush, but it will not grind. An interesting tool for doing this
work is the pneumatic stone-dresser, which materially hastens the
operation. All of the stone- dressing for the entire plant is done
here, the mills being so arranged that both the bed-stone and
grinder ma}' be removed.
As the manufadlure of the " Town and Country"
ready-mixed paints is the culminating work of this
establishment, we will mention some other departments
before describing the one devoted to this raanufacfture.
On our way from the oil-treatment house we take a glance at
the stable, aiiy% well lighted, well ventilated, and equipped as it
THE CHEMISTRY OF PAINTS.
should be for the fortv-five magnificent animals it
houses. The draught horses are mostly Clydesdales
weighing 1600 to 1900 lbs. each, and when doing their work
(without apparent effort) in front of the large and heavily-loaded
wagons, they well represent the substantial character of the business.
The printing office is a necessar}" adjuncT;; in it every la-
Printing ¥^' P^^^ ^i^^' circular, etc. that pertains to the bu-
Department. smcss IS prepared; all of the work (including colored
plates) of this pamphlet was done in it. Already it has
estabhshed an excellent reputation for choice color-work- the inks
used are prepared in the color mill-house.
Another feature that impresses the visitor is the system of
raikoad tracks ramifying the entire plant and connec5ling with
TransDor ^11 the trunk lines entering the city; there is over\alf a
tation °^^^^ ^l railroad tracks in the works, and these give
Faduties. "^^f^^ direa connections wath the main tracks of the
t. o .. /^\^^'^7 ^^^^^ passing in proximity. Lving directly on
the Schuylkill River, vessels discharge brimstone and other crude
material from foreign sources without cost of lighterage or other
handling; m fadl, ever}^ facility is afforded for recei\ing material
from and shipping it to all points, and for the condud of the
business of the establishment upon the most favorable conditions
Ready.Mixed r.^T^"'"^^'''^^ .^\^''^^^-^''^ Countr>- rcady-mixcd
Paint P^^^^ department, the visitor is impressed by an arrav of
Department, tanks carr3ang their height through two floors. These
are the mixers, eighteen in all; they are double— that
is, one tank withm another— and with internal machiner>' that beats
Mixers. ^^^ mixcs the material into a homogeneous con-
• ^ .1. . sistency. The pigments and vehicles are char^red
into the tanks from the fourth floor of the building. The paste
ri Ir ^^j\^i^^^^^^ite are brought up in iron cars; the liquids
are delivered by the air-pressure, and when material equal in
volume to 700 gallons is placed in each mixer, the powerful
machinery is set in motion, and the process of churning, beating
ttS ^""^ "^'^'''^ '' continued for two days. Can any hand!
method m any way approach this in effectiveness > These
mixers are only for making the white base of the painf
coloring and ^hc coloHug IS douc in smaller mixers. The power-
shading, i^l tmtmg colors are first reduced Tv4th oil in mixers
somewhat similar to the large ones described to a verv
n^'m?xe"s ir^^he' ri /l"" ^''^' ^^ ^^^ ^^'^^^^ ^^^ S'the coin-
ing mixers in the nght proportions to produce the desired tints;
THE CHEMISTRY OF PAINTS.
skin' ' or
these coloring mixers make 150 to 200 gallons to each batch
From these the fanished pamt is deposited in the storage and
filling tanks, whence it is filled into packages as required
Before the paint is filled into a package it is strained through a
ver>' fine wire sieve which removes every trace of " cv;«'' ^^
All the work is by gravity; the operations com-
mence on the fourth floor and the paint is delivered
into the packages on the first. The business is con-
dudled so systematically that ten thousand gallons
of paint may be delivered in ten hours without any pres-
sure or confusion.
Some of the rules governing this department are w^ell worthy of
notice. The shades and tints are maintained to a uniformity by a
peculiar system of unchangeable standards. It is well
known that white lead, zinc white and colors react on Uniformity of
one another chemically, and slowly but surely change ^^^^^^^^"^^•
their original tone. Now, to prevent a change in the color-
standards they are here made of absolutely non-
changeable, inert material, which, while having no paint ^°change-
property of itself, senses to give the ''shader" his un-
erring standard to w^hich to shade each batch.
After the shader has done his w^ork and passed the paint,
a practical painter samples the batch, paints it out, and
notes carefully its body, working and drv'ing. It can- Tests and
not be packed until he pronounces it correct in these ^°^p*^*=''°°-
particulars, when the packers may have it. From the pack-
ing tanks it is drawm off into a gauged receptacle holding ten
gallons. This measure is on a truck scale; when the measure
is full to the proper mark it is weighed by a weigh clerk, who
compares the weight with the table of weights. If it vary
more than one per cent, from the average weight, it is rejected
and must be remanipulated. If found correct, it is filled into
the desired packages.
It is w^ell to note right here that much of the manufacture
is packed in one-gallon cans. Much is said about ' * trade' '
gallons and "commercial" gallons. Now, the United
States standard gallon is 231 cubic inches. Some Honest
manufacturers lay great stress on the alleged fact
that their one-gallon cans hold 231 cubic inches; but even so: that
does not permit 231 cubic inches of paint to be put in them; in
other words, a can cannot be entirely filled. If the "Town and
THE CHEMISTRY OF PAINTS.
Country*' one-gallon cans be measured, it will be found that their
capacity is nearly 240 cubic inches, and that 231 cubic inches of
paint are packed into them.
A practice, rapidly dying out, we believe, is to sell what are
called "trade" gallons. These hold less than seven pints. A
can to hold one gallon should be not less than six and
Measure*^ cleven-sixteenth inches in diameter, and six and three-
^^ ^^" quarter inches in height. Height is frequently used
to deceive the unwary, as many so-called gallon cans are seven
inches high, but only six in diameter, and such a can will not hold
quite seven pints.
We have seen the manufacture of '*Town andCountr>^" ready-
mixed paints from the crudest material to the finished product
read}^ for use, and have learned much of the chemistr>' of the
subject in plain, matter-of-fact language. A little more may be
said in the way of practical chemistr>' , and then some practical
suggestions will be given.
As the perishing of paint is almost entirely due to the destruc-
. tion of the vehicle, and as nearly all the pigments which
Paint, ^^^^ fulfil the immediate or first requirements in paint-
making are more or less chemically active and aid in
the destruction of the vehicle, scientific paint-making requires
that the vehicle be rendered as inert as possible to the action of
the pigment; and further, in ready-mixed paint-making it is ver}^
Why Town csscntial that chemical action should not take place
and Country between the components of the paint while it is in the
Paint does package in the store-house waiting for the buyer. In
not cbangc. ^Xown and Countr}' paints this chemical action is pre-
vented by keeping the paint in a state of emulsion. The water of
emulsion must evaporate before the dr}ing action can take place.
As this water evaporates, the surface of the paint gradually as-
sumes that smooth and even condition which produces the hard,
glossy, durable surface for which these paints are so renowned.
Unfortunately, this plan of paint-making permits the unscrupu-
lous manufacturer to palm off water for paint when the quantity-
introduced is more than sufficient for its proper use. Such a paint,
however, will not be used by the practical painter or by any one
who is a fair judge of paints. A good test of this paint is
weight; taking the pale tints, which must contain the maximum
of zinc and lead base. When properly made, the emulsified paint
weighs 13 to 15 pounds per gallon; the water paints will weigh
but q to II. This rule will not apply to those dark colors which
THE CHEMISTRY OE PAINTS.
do not permit the use of any white in their preparation. These may
be made of pigment and oil only, and weigh but 9 pounds.
In the Town and Country paints the oily vehicle is simply the
purest linseed oil that is made, very carefully treated to make it
durable, kept by emulsion in an inert condition until used, and
rendered fluid for working under the brush by the addition of
naphtha, which more than any other vehicle has the property of
thinning a paint, and therefore may be used in smallest proportion;
furthermore, ever>' atom of this evaporates on drying, so that the
pure pigment and durable oil only are left on the surface.
The reader who has followed these pages to this point is with-
out doabt convinced that it would be difficult to find a paint su-
perior to that produced in this estabhshment, and doubtless he
beheves that the proper place for mixing the paints — as it is for
grinding them — is the factory.
The change of the present day to paints ready mixed, or en-
tirely prepared for use, is in conformity with the gen- ^hy there
eral advancement of the age: it is not revolutionary or ^^^ R^^^y-
extraordinar>'; it is simply a step in a natural evolu- Mixed Paints.
tion or progression. As the grinding of dry paints by
hand with slab and muller was succeeded by the employment of
steam machinery, so the mixing of paste paints by means of a
stick into a condition for use has been superseded also, in its
turn, by the use of mechanism specially designed. It is merely a
repetition of the story we see everywhere around us: manual labor
with its drudgery, want of uniformity, and want of completeness
giving place to the perfection of scientific appliances.
Not only does the use of ready-mixed paints constitute a gain
to the painter in convenience and economy, saving
drudgery, waste and time, but, what is of even greater
importance respecially to the property owner), there is
also a material gain — when standard brands, such as
the Town and Country, are purchased— in the quality
of the paints obtained. Under the old method of paint-
mixing it is impossible to incorporate with the pigment niore than
a certain quantity of oil without interfering with its working qual-
ities. Oil, however, is really the life of paint; it is mainly from
the oil that paint obtains its preser\^ative virtue, and it may be
laid down as an axiom that the more oil (consistent with the re-
tention of proper working qualities), and the better the oil, the
better the paint. This is one reason why the Town and Country
paints are found so superior in durability to white lead mixed
to the work
of the Prac-
THE CHEMISTRY OF PAINTS.
in the ordinary way, and it partially explains the gain in quality
referred to above. The method of the preparation of these paints
causes the incorporation of a much larger percentage of oil than
has been possible by previous methods. When we add to this
the fact that the process employed gives also a rich gloss or finish
unobtainable in any other way, which, besides adding greatly to
beauty of appearance, enables the paints to resist more effectually
the action of the elements, the superiority of the new system over
the old will be apparent.
The advantages of a paint read}- for use (ready for use except-
ing the addition of more oil for raw surfaces) are now so w^ell
recognized that nothing need be said in their favor,
thfng, there Much Condemnation of ready -mixed paints is heard be-
any^coSnte^ causcso many are inferior and give such unsatisfactory
feit. results. But no one condemns real money because
there is counterfeit mone\% and no one condemns white
lead or painters' colors because much that is sold is counterfeit.
We know that good and pure may be had, and when once we are
made acquainted with the reliabilit}- or lack of it in different
brands, we are no longer imposed upon. So with paints ready for
use. Some are good, many are bad. When we learn to discrim-
inate between the good and bad, and use only the former, we shall
recognize full}' their value, their superiority for exterior work to
any hand-mixed paint.
At one time skilled painters feared that giving up the control
of mixing the paints they used might prove detrimental to their
business; but so many have admitted the groundlessness of such
fear b}^ their regular use of high-grade mixed paints that this sub-
ject need no longer be considered.
The manufacturers of ''Town and Country'" paint prefer that
other paint be used by any one who will not employ a competent
painter, because unskilled painters cannot do good
Painters use work, and their lack of skill and experience leads to
Rlfdy^Mii^ the condemnation of the paint used by them. Ver>'
Paints. few competent painters, and none who have intelligent-
ly tested it, will deny the superiority of the ' ' Town
and Countr}^" paint for exterior painting when compared with
the best shop- or hand-mixed material. They recognize its ad-
vantages, just as they recognize the advantage of buying white
lead and colors already ground, instead of buying the dr>' pig-
ment and vehicle separately and grinding them together in the
shop; no one could do that now and earn his salt.
THE CHEMISTRY OF PAINTS.
While it is an unquestioned fact that but few painters — and
only those of great capacity and experience — can produce shades
of color of such beauty and richness as are furnished, ready for
use, in the ''Town and Countr\'" paints, and, while it is also
true that painters, whatever their training, cannot produce paints
of similar quality by the means at their command, still, the object
of the manufacturers is not to do away with, but rather to sup-
plement, the painter's work. There is no antagonism possible or
intended. The manufacturers of *' Town and Country" paints,
so far from endeavoring to lessen the use of experienced labor,
most strongly urge and recommend its constant employment.
They recognize that the greater the skill of the workman the
better the results obtained from their material, and the better
these results the more advantageous it is for the reputation of
their paints, and, consequently, for their interests.
To obtain satisfactory results it is not only essential
to have the best material, but that material must^be
properly used. If work be done regardless of the con-
ditions necessary to insure permanency, failure is
simply invited and must be expected.
Too much stress cannot be laid upon selecting the proper time
for painting. Work done in wet weather or on rain-
soaked wood or sappy or unseasoned wood is alrnost
certain to fail. Work done hurriedly or with thick,
heavy coats of paint is also almost certain to result in
See that your painting is done in dry weather,
ample time is given between coats for each to dry; see that no
more paint is used than is necessar>-; see that all new work has
three coats. Three thin coats will take less paint than two heavy
coats and will wear better and longer. Above all things, see that
you have an experienced, capable and honest man to do your work.
Such a workman will probably give better results with poor
material than the incompetent man will with the best material.
Some manufaaurers guarantee the durabihty of their pamt,
and, strange as it may seem, some of the poorest Guarantee,
paints are most strongly guaranteed. The *'Town
and Countr>^" paint is sold simply on a warranty of its punty and
composition, and this warranty will be accompanied by any reason-
able penalty required. The manufacturers know from a long
experience that properly used, and used under proper conditions
nothkig but the best results can be obtained, and they will not
Hints on the
THE CHEMISTRY OF PAINTS.
hold themselves responsible for the ignorance or cupidity of the
property owner or the inexperience or dishonesty of the one ap-
plying the paint.
It is absolutely necessary for good results that the original
surface be put in good condition. It is a common error, even
with experienced painters, to believe that anything
^"d°^h ^'^^^ ^^ ^^^ priming; but as the priming coat bears
NecJLa^. the same relation to the succeeding coats that the
foundation of a building bears to the superstructure,
it is as fallacious to expect durability from a bad priming coat as
permanence from a building that has a poor, uncertain or bad
foundation. In many buildings the lumber is inferior, wet, or
unseasoned. In such cases the priming coat should be applied
when the weather is driest, and allowed to remain for some weeks
before applying the other coats. The oil appears to displace the
sap, hastening its evaporation. If the succeeding coats were
applied at once, the sap would be held in, and finally result in
peeling or scaling the paint. If the wood be well seasoned, no more
time need be given after its application than sufficient to dry the
priming coat thoroughly.
The essential properties of the priming coat are to fill the
pores and make a surface to which the succeeding coats will
.^ firmly adhere. Therefore, the pigment should be one
Properties that will Carry a large quantit}^ of oil, and still make a
prfmer°^ Workable paint, and also be chemically inactive, yet
in such mechanical condition that its particles will at-
tach themselves to the grain of the wood. White lead does
not fill all of these conditions so well as certain ochres that are
free from clay, but which contain free silica in a sharp but finely-
divided state. An ochre that will not carry three times its own
weight of raw oil, and at the same time be a fairly thick paint,
will not meet the requirements.
To m^et all these conditions, Messrs. Harrison Bros. & Co.
'Town and ^^^'^ prepared their "Town and Country" primer and
Country'" filler, and this has proven to be the most suitable
pnmer and article yctofi'ered for the purpose. While this should be
applied freely, it is to be thoroughly worked into the
surface. If a heavy coat be applied to sap or yellow pine and al-
lowed to stand for several months, it will be found that the sap or
resin has been killed; this may then be cleaned oflf and the work
finished, with most durable result. Work will not stand when
finished at once, on green, sappv. resinous or waterlogged wood.
TKfcU^ ' -^UTi 1 "
THE CHEMISTRY OF PAINTS.
As previously stated, not only is much of the ready-mixed
paint that is offered for sale worthless, but so are many ^ ^^^^
of the painters' colors and much of the white lead, and i„pu„oii.
therefore one is liable to as much imposition, unin-
tentionallv or otherwise, on the part of the vender in buymg the
ingredients separately and mixing them himself as ^^^^^ ^^^
in buying them in mixed form. In fact, at this time in Mixing
( 1 89 1 ) there is more danger from sophisticated linseed oil ^^^^fX
and oil substitutes than even from white lead and colors.
An intelligent painter, writing from a Western city of 40,000
population, states that nearly all the painting done there m a year
was with oil retailed at less than one-half the crusher's The con-
price for linseed oil, and asks, Can any sensible man be J»»«JJ;S
surprised at the general dissatisfaction with painting ? Quality in
Poor pigments and good oil are a better combination u^i-counS^"
than the best pigments and sophisticated oil. In using paints.
• ' Town and Country ' ' paints the consumer is assured of
not only the use of the best quality of oil and the best pigments, but
the verv best combination of them known in modern paint-makmg.
It is absolutely impossible to give a paint m mixed forni— that
is of the proper consistency— for all kinds of surfaces and all sorts
of temperatures. When the surface is very raw or ^^.^^ ^^^^
absorbent, a thinner paint must be used than for a hard beofcon-
or non-absorbent surface; and a paint that is of the I^^IZ^.
right consistency for work in a temperature of 50 or tionsof sur^
60® will be found quite too thin in a temperature 01 »o xemperaturt.
or QO° In "Town and Country" paint the consist-
encris just right for a hard surface and moderate temperature,
and in general for a fini.shing coat. Oil or turpentine, or both,
must be used for the undercoats, and these are the only articles to
be pro^•ided in addition to the "Town and Country pamt. It
therefore becomes necessary that every one using Town and
Country" paint assure himself that the oil or turpentine used
is perfectly pure and of the best quality. ,• j -,
It is not contended that the use of cheap oils or linseed-oil
Mihstitutes is never justifiable, for there are occasions when
painting is for temporary purposes only, and it may be wise to
use matenal of only temporary value; but what is unjustifiable is
vendine impure oil or oil substitutes as pure linseed oil; and it
^ems to us that the linseed-oil manufacturer and consumer have
the same right to protection by law against such pradice as the
datryman !nd the butter consumer have against the sale of
THE CHEMISTRY OF PAINTS.
oleomargarine as genuine butter. As the sale of oleomargarine
as such is not objected to, so there cannot be any objection to the
sale of substitute oils as such.
Our talk about priming has had reference to new work mainly.
The repainting of a surface when the old paint has thoroughly
perished — that is, has become like dust — is quite a
of^lintlr/ simple matter. After the surface has been thoroughly
Surfaces. saud-papercd and dusted the primer and filler maybe used
as for new w^ork, or the color in which the work is to
be finished applied at once; but not more than two coats, the first
coat made very thin with raw linseed oil and some turpentine.
The "Town and Country" paint of usual consistency should be
thinned for such work with about one quart of oil and one pint of
turpentine to each gallon. The turpentine aids it to penetrate the
pores of the old paint.
When the old paint is very hard, but inclined to chip oflf, very
great care is required to produce good results, because the new
paint on top of the old will, by the contradlion in dr>ang, causes
the latter to loosen its already feeble hold, and old and new come
off together, The old paint will not permit the penetration of the
new paint through it, so as to give it a new bond to the wood or
original surface, and it is not sufiiciently bonded to resist the con-
tra<5tion of the new coat in drying; thorough scraping must first
be resorted to. Unless the color is to be changed, it is best to give
such a surface but one coat, as thin as it is possible to work it and
cover properly. If the color is to be changed, give two coats, but
with an interval of several weeks, and each coat as light as it can
New work should always have three coats, the first to be
New Work ^^ primer and filler, as previously directed. The
second and third coats are to be of the color selecfled.
The '*Town and Country" paint for second coat is to be thinned
with about one quart of oil and one pint to one quart of tuq^entine
to each gallon, or half the quantity of perfectly sweet naphtha
may be used in place of the turpentine. Naphtha containing coal
oil will injure the paint, and must not be used under any circum-
stances. This coat must be well brushed out. For the'finishing
coat the "Town and Country" paint is usually of proper consist-
ency; if too stout, add raw linseed oil only in just sufficient quan-
tity to make the paint work freely under the brush.
On every package of paint a few plain and explicit direAions
THE CHEMISTRY OF PAINTS.
It is obvious that the quantity of paint required will vary ac-
cording to the state of the surface to be painted. For
new work on lumber fairly smooth and of good quality ^eTu^J^
it wnll be safe to estimate 275 to 300 square feet of sur-
face per gallon, three coats, used as above diredled, about two-
fifths to be primer and filler. On a surface properly prepared with
Primer and Filler, one gallon of "Town and Country" paint will
cover 400 square feet or more of surface, two coats. The great
economv of the paint is at once apparent.
Economic house-painting, it is thus seen, does not depend
upon buving the lowest-priced materials; such general-
ly have but little pigment or vehicle value, and are,
therefore, relatively dearer; and they lack the element
of durability. That paint is best which can be laid on
in the thinnest layers. The cheap nostrums must be " flowed
on" in thick layers, otherwise the surface will not be covered.
Bear in mind, the Harrison establishment is the only one in
which are conducted all the processes of manufaaure, from the
crude material to the finished produd.
When measuring for quantity required do not make any al-
lowance for window and other openings, as they will ^^^^^,^^^
not any more than equal the extra surface of frames,
mouldings and other projections. It is quite proper to take the
lenffth, breadth and height of a building m full.
Positive rules for the selection of colors cannot be given. It is
probably one of the most difficult features m the work ^^^^ ^^
of beautifying the home; so difficult is it that the prop- colors,
ertv-owner will frequently waive his or her natural
sood taste to the judgment of the painter. .^ This is well when the
painter is progressive, has fine taste and will continually workout
new color schemes, instead of (as is too frequently the case) follow-
ine one idea, and that usually very dull or inharmonious. The
grlat variety of colors in the "Town and Country pam s permits
fven- possible color scheme to be followed^ One well-pamted
house in a community that has had a long affliction of ^^^^^
stone color or drab creates an improvement m the gen- Painting
eraftaste, leading quickly to the betterment of the en- i-p--
tire neighborhood and increases the value of property. It values.
is now quite common to find suburbs of cities of most
Sctresque appearance, due entirely to the use of "Town ^nd
SS^^ bright and harmonious combination of the difi;er-
ent shades As it is impossible to give satisfactorily m words a gmde
THE CHEMISTRY OF PAIXTS.
for the selection and application of colors, some illustrations are
furnished as suggestions of good color effect; but print-
iiiustrauona. ^^^, ink fails to do justice to the subject. The parent
house or any of its branches will suggest combinations on receipt of
architect's elevation, photograph or sketch of building, and will
give full directions for the placing of each color. To aid in this
work the proprietors have published, at great expense,
fn^how' ^ portfolio of fift}' designs on a large scale. These are
obtainld. in the hands of their agents, of architects and of prom-
inent builders, and are for the use of any one intending
to buy or use the paint. An>' one addressing the house will be in-
formed w^here a portfolio may be seen, or will be loaned one under
Due regard must be given to the architecture of the building
. . .^ , in both the selection and the application of the colors;
Architecture , , . , . . ^^ . i • i ■ i I-
of Building though, HI general, an^- combination which is good of
conAdered. itself may be used, provided each element is properly
Harmonious color selections may be made from either analo-
gous colors or complementary colors. It has become common to
use the latter sj^stem, yet it is one which requires the best devel-
opment of the color sense, and for this reason better results are
generall}^ obtained by one with natural good taste than by one
without who attempts to apply the theory of complementaiy
colors. Where there is a combination of the two systems, ver>^
pleasing results are obtained; for instance, a gradation from an
olive brown to alight but warm yellow tint. This subject, how-
ever, can be covered satisfactorily by illustrations only.
** Town and Countr>'" paints are intended primarily for exterior
^^^^ ^ house-painting, but, properly used, they make an
Country" equally good interior paint. For plastered walls they
where'used. ^^^ exceptionally valuable, making a finish that will
permit continued cleaning. For the plastered w^alls of
kitchens and bath-rooms they make a finish inferior in value
only to glazed tile.
For floors they will not dry flinty enough unless applied in
Floor-Paint- nuiuerous thin coats; for such use they should be thin-
ing. n^(j well with refined naphtha (benzine). For floor-
painting it is best to use Harrisons' Floor Paints, which are espe- |\-
cially prepared for such purpose; these are actually hardened by ^
washing and are ver>^ resistant to ordinarv* wear.
For furniture-painting a diflferent system is necessary. Paints
THE CHEMISTRY OF PAINTS,
as prepared for house-painting will not do for furniture.
Harrisons' Varnish Carriage Paints or Interior Deco-
rative Enamels may be used for furniture-painting or
decoration with most satisfactor>' results.
'^Town and Countr}'" paints have been found eminently dur-
able and economical for vessel-painting, and are recom- vessei-
mended for such use. ^'f''^-
Testimonials could be furnished ad nauseam. Better evidence
of the value of these paints than their long-continued ^^^^^^^^^^^_
use by the most intelligent painters cannot be offered.
There are many who cannot appreciate the difference between
good and bad, but the Harrison estabhshment does not exist for
We have already made our journey through this extensive
plant longer than originally intended, and in conclusion Conclusion.
are pleased to state that any one interested m paints and
painting is cordially invited to visit it and see for himself what
these pages are intended to describe.
BEARING THE NAME OF
HAREISON BROTHERS & HO.
AND CLAIMING BY THE
LABEL TO BE
ARE GUARANTEED TO BE OF